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arXiv · 0711.0101

First access to beta half-lives approaching the r-process path near N=126

T. Kurtukian-Nieto·J. Benlliure·L. Audouin·F. Becker·B. Blank·I. N. Borzov·E. Casarejos·M. Fernandez-Ordonez·J. Giovinazzo·D. Henzlova·B. Jurado·K. Langanke·G. Martinez-Pinedo·J. Pereira·F. Rejmund·K. -H. Schmidt·O. Yordanov
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Abstract

Heavy neutron-rich nuclei close to N=126 were produced by fragmentation of a 1 A GeV 208Pb beam at the FRS at GSI. The beta-decay half-lives of 8 nuclides have been determined. The comparison of the data with model calculations including an approach based on the self-consistent ground-state description and continuum QRPA considering the Gamow-Teller and first-forbidden decays provide a first indication on the importance of first-forbidden transitions around A=195. The measured data indicate that the matter flow in the r-process to heavier fissioning nuclei is faster than previously expected.

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T. Kurtukian-Nieto, J. Benlliure, L. Audouin, F. Becker, B. Blank, I. N. Borzov, E. Casarejos, M. Fernandez-Ordonez, J. Giovinazzo, D. Henzlova, B. Jurado, K. Langanke, G. Martinez-Pinedo, J. Pereira, F. Rejmund, K. -H. Schmidt, O. Yordanov. 2007-11-01. First access to beta half-lives approaching the r-process path near N=126. https://arxiv.org/abs/0711.0101

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